import java.util.*

/**
 *@ClassName MapDemo
 *
 *@Author ykx
 *@Date  2024/6/17 16:28
 *@Version 1.0
 */
fun main(args: Array<String>) {
    var map = TreeMap<String, String>()
    map.put("好", "good")
    map["学习"] = "study"
    map["天"] = "day"
    map["上"] = "up"
    println(map["好"])

}